herrozerro wrote:from the book: "Catastrophic Malfunction: The device explodes for 2d6 damage in a Large Burst Template."

is the device lost?

Yep, things that explode tend to be "lost."

More specifically in this case, the gizmo would be destroyed by virtue of it exploding.

herrozerro wrote:can the device be rebuilt ever?

Sure. As noted under Losing Devices (pg. 105 of SWD), if an inventor’s gizmo is taken away, lost, or destroyed, he can make another using the listed rules. As noted above, destroyed definitely applies in this case.